S
M
T
W
T
F
S
26
93°
55°
27
93°
57°
28
93°
61°
29
93°
55°
30
97°
57°
1
95°
61°
2
82°
57°
3
77°
55°
4
93°
50°
5
93°
55°
6
95°
61°
7
93°
64°
8
90°
61°
9
88°
63°
10
84°
59°
11
81°
61°
12
77°
61°
13
82°
50°
14
88°
55°
15
93°
57°
16
91°
61°
17
91°
57°
18
90°
64°
19
81°
61°
20
86°
59°
21
84°
57°
22
86°
57°
23
81°
57°
24
81°
61°
25
82°
61°
26
88°
57°
27
79°
59°
28
84°
55°
29
80°
56°
30
82°
57°
31
78°
54°
1
75°
55°
2
76°
58°
3
73°
57°
4
70°
54°
5
71°
54°
6
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Francisco
San Francisco's May 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 54° and 58°. The average high for May is 75° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in San Francisco. See also: June | July | August.
